Oracle 9i to Teradata Migration

Guys,
The company i am working in is planning to do a migration of the datawarehouse from oracle 9i to teradata v2 r5=2EI just wanted to know what are the common issues one will face during such a migration and if possible please suggest me some remedies too=2E

I am migrating AS400 to DB2. I haven?t had problems in the part of Microstrategy, I only need change the applysimples and the freesql, and in a few reports I need change a littel thing. I think that the change of DB in MSTR work very fine. The big problems are in the ETL.
Lucky with your migration.

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